Window-lock



T. A, SMITH.

WINDOW LOCK.

APPLICATION FILED JAN.16, 1920.

1,374,773. 7 Patented Apr. 12, 1921.

PATENT OFFICE.

THOMAS ALOYSIUS SMITH, 0F ASHLEY, PENNSYLVANIA.

' WINDOW-LOCK.

Application filed January 16, 1920. Serial No.

To all whom it mary concern Be it known that I, THOMAS A. SMITH, acitizen of the United States, residing at Ashley in the county ofLuzerne and State of Pennsylvania, iave invented new and usefulImprovements in vVindowLocks, of which the following is a specification.

This invention relates to looks for windows and the principal object ofthe invention is to provide means for automatically locking the lowersash in closed position as soon as said sash is lowered while permittingthe upper sash to be moved.

Another object of the invention is to provide meanswhereby the lock maybe easily released by a person inside the room or building.

This invention also consists in certain other features of constructionand in the combination and arrangement of the several parts, to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claim.

In describing my invention indetail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the several views, and in which Figure 1is a View showing the invention in use.

Fig. 2 is a sectional view of the look.

In these views 1 indicates a part of the window frame and 2 indicates apart of the lower sash. 3 indicates the casing of the lock which has itsbase provided with projecting ends 4 for receiving the screws forholding the lock to the frame. One side of the casing is provided withan opening 5 and an opening 6 is formed in its top. The rocking lever 7is pivoted in said casing by means of the pin 8 and said lever has itslower end bent outwardly to extend through the opening 5 when the leveris in one position. The upper end of said lever extends through theopening 6 and is adapted to be seized by the hand of the operator. Aspring 9 is carried bythe casing and has its free end engaging the leverand tends to Specification of Letters Patent.

Patented Apr. 12, 1921.

press said lever against the side of the easing with its bent endprojecting through the opening 5. When the projecting end of the leveris pressed to one side by the fingers the spring will be pressed uponitself by the said lever as its lower part swings inwardly within thecasing.

A plate 10 is fastened to the sash and this plate carries a projectinglug 11 for engaging the bent end of the lever.

It will thus be seen that when the sash is lowered the lug will strikethe projecting end of the lever and force the same inwardly against theaction of the spring. As soon as the lug passes said lever the springwill force the lever outwardly again so that its end will engage theupper side of the lug and thus prevent upward movement of the sash untilsaid lever is moved manually.

In this way the sash will be automatically 7 looked as soon as it islowered and the upper sash is free to be lowered and raised.

It will of course be understood that my improved lock may be used on theupper sash if desired.

It is thought from the foregoing description that the advantages andnovel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the constructionand in the combination and arrangement of the several parts, providedthat such changes fall within the scope of the appended claim.

What I claim is p A sash lock comprising a casing having its baseprovided with end extensions, means for securing said extensions to thewindow easing, one side and the top end of said casing having openingstherein, a lever pivoted in the casing adjacent the top opening, saidlever having a bent lower end passing through the side opening and itsupper end passing through the upper opening. a curved spring in saidcasing having its curved end engaging the lever adjacent the bent endthereof and a lug on the sash for engaging the bent end of the lever. v

In testimony whereof I afiiX my signature.

THOMAS ALOYSIUS SMITH.

